X = int(input())

rankArr=[2000,1800,1600,1400,1200,1000,800,600,400]

for i in range(1,len(rankArr)):
  if rankArr[i] <= X and X < rankArr[i-1] :
    print(i)
    exit() X = int(input()) X int(input()) int input() input rankArr=[2000,1800,1600,1400,1200,1000,800,600,400] rankArr [2000,1800,1600,1400,1200,1000,800,600,400] 2000 1800 1600 1400 1200 1000 800 600 400 for i in range(1,len(rankArr)):
  if rankArr[i] <= X and X < rankArr[i-1] :
    print(i)
    exit() i range(1,len(rankArr)) range 1 len(rankArr) len rankArr if rankArr[i] <= X and X < rankArr[i-1] :
    print(i)
    exit() rankArr[i] <= X and X < rankArr[i-1] rankArr[i] <= X rankArr[i] rankArr i X X < rankArr[i-1] X rankArr[i-1] rankArr i-1 i 1 print(i) print i exit() exit rankArr=[2000,1800,1600,1400,1200,1000,800,600,400] [2000,1800,1600,1400,1200,1000,800,600,400] rankArr X = int(input()) int(input()) X
X = int(input())

rankArr=[2000,1800,1600,1400,1200,1000,800,600,400]

for i in range(1,len(rankArr)):
  if rankArr[i] <= X and X < rankArr[i-1] :
    print(i)
    exit()